Delta Electronics Series H48SA User manual

1
FEATURES
High efficiency: 93.2% @ 12V/ 25A
Standard footprint: 58.4 x 61.0 x 11.2 mm
(2.30” x2.40”x0.44”)
Industry standard pin out
Single board construction
Fixed frequency operation
2250V Isolation
Basic insulation
Monotonic startup into normal and pre-
bias loads
Fully protected: input UVLO, output OVP,
OCP, OTP
No minimum load required
Wide output trim range: -20%, +10%
ISO 9001, TL 9000, ISO 14001, QS
9000, OHSAS 18001 certified
manufacturing facility
UL/cUL 60950-1 (US & Canada)
Recognized, and TUV (EN60950-1)
Certified
CE mark meets 73/23/EEC and
93/68/EEC directives
OPTIONS
Positive on/off
Heatspreader available for extended
operation
APPLICATIONS
Telecom / DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial / Test Equipment
Delphi Series H48SA, Half Brick Family
DC/DC Power Modules: 48V in, 12V/25A out
The Delphi Series H48SA Half Brick, 48V input, single output, isolated,
open frame DC/DC converters are the latest offering from a world
leader in power systems technology and manufacturing — Delta
Electronics, Inc. This product family provides up to 300 watts of power
or up to 25A of output current in an industry standard footprint. This
product represents the next generation of design technology required
by today’s leading-edge circuitry. With creative design technology and
optimization of component placement, these converters possess
outstanding electrical and thermal performance, as well as extremely
high reliability under highly stressful operating conditions. Typical
efficiency of the 12V, 300W module is better than 93.2% and all
modules are fully protected from abnormal input/output voltage, current
and temperature conditions. The Delphi Series converters meet all
safety requirements with basic insulation. A variety of optional
heatsinks are available for extended thermal operation.
DATASHEET
DS_H48SA12025_05052008

DS_H48SA12025_05052008
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TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS H48SA12025 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc
Transient (100ms) 100ms 100 Vdc
Operating Device Temperature(Openframe) Please refer to fig24. for the measuring point -40 122 °C
Operating Device Temperature(Heatspreader) Please refer to fig25. for the measuring point -40 109 °C
Storage Temperature -55 125 °C
Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 48 75 Vdc
Input Under-Voltage Lockout
Turn-On Voltage Threshold 32.5 34 35.5 Vdc
Turn-Off Voltage Threshold 30.5 32 33.5 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc
Maximum Input Current Vin=36V, 100% Load 9.5 A
No-Load Input Current 170 240 mA
Off Converter Input Current 18 mA
Inrush Current(I2t) With 100uF external input cap 1 A2S
Input Terminal Ripple Current RMS, With 100uF/0.1ohm input cap, 100% Load 0.42 A
Input Reflected-Ripple Current Pk-Pk, thru 12µH inductor, 5Hz to 20MHz, 100% Load 7 mA
Input Voltage Ripple Rejection 120 Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25℃11.82 12 12.18 Vdc
Output Voltage Regulation
Over Load Io=Io,min to Io,max ±10 mV
Over Line Vin=36V to 75V ±10 mV
Over Temperature Tc=-40℃to 100℃±120 mV
Total Output Voltage Range over sample load, line and temperature 11.64 12.36 V
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak 100% Load, 1µF ceramic, 10µF tantalum 60 120 mV
RMS 100% Load, 1µF ceramic, 10µF tantalum 30 60 mV
Operating Output Current Range Full input range 0 25 A
Operating Output Power Range Full input range 0 300 W
Output DC Current Protection Full input range 110 150 %
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current 50% Io,max to 75% Io,max 400 mV
Negative Step Change in Output Current 75% Io,max to 50% Io,max 400 mV
Settling Time (within 1% Vout nominal) 400 uS
Turn-On Transient
Start-Up Time, From On/Off Control 12 28 mS
Start-Up Time, From Input 12 28 mS
Maximum Output Capacitance 100% Resistor load; 5% overshoot of Vout at startup 10000 µF
EFFICIENCY
100% Load Vin=48V 93.2 %
60% Load Vin=48V 92.5 %
ISOLATION CHARACTERISTICS
Input to Output 2250 Vdc
Isolation Resistance 10 MΩ
Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 300 kHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On) Von/off -2 1.2 V
Logic High (Module Off) Von/off 3 18 V
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off -2 1.2 V
Logic High (Module On) Von/off 3 18 V
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.3 mA
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=3V 10 uA
Leakage Current(for both remote on/off logic) Logic High, Von/off=15V 100 uA
Output Voltage Trim Range Pout <= max rated power 9.6 13.2 V
Output Voltage Remote Sense Range Pout <= max rated power 10 %
Output Over-Voltage Protection Over full input range; Over full temp range 115 140 %
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C,airflow rate=300 LFM 1.5 M hours
Weight Open frame 80 grams
Over-Temperature Shutdown(Openframe) Please refer to Fig 24. for the measuring point 127 °C
Over-Temperature Shutdown(Heatspreader) Please refer to Fig 25. for the measuring point 116 °C

DS_H48SA12025_05052008
ELECTRICAL CHARACTERISTICS CURVES
60
65
70
75
80
85
90
95
5 10152025
OUTPUT CURRENT (A)
EFFICIENCY (%)
36Vin
75Vin
48Vin
0
5
10
15
20
25
30
0 5 10 15 20 25
OUTPUT CURRENT (A)
POWER DISSIPATION (W)
36Vin
48Vin
75Vin
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C. Vout=12V.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C. Vout=12V.
60
65
70
75
80
85
90
95
5 10152025
OUTPUT CURRENT (A)
EFFICIENCY (%)
36Vin
75Vin
48Vin
0
5
10
15
20
25
30
0 5 10 15 20 25
OUTPUT CURRENT (A)
POWER DISSIPATION (W)
36Vin
48Vin
75Vin
Figure 3: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C. Vout=9.6V.
Figure 4: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C. Vout=9.6V.
3

DS_H48SA12025_05052008
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ELECTRICAL CHARACTERISTICS CURVES
60
65
70
75
80
85
90
95
5 10152025
OUT PUT CURRENT (A)
EFFICIENCY (%)
36Vin
75Vin
48Vin
0
5
10
15
20
25
30
0 5 10 15 20 25
OUT PUT CURRENT (A)
POWER DISSIPATION (W)
36Vin
48Vin
75Vin
Figure 5: Efficiency vs. output voltage for minimum, nominal,
and maximum input voltage at 25°C, Vout=
13 .2V.
Figure 6: Power dissipation vs. output voltage for minimum,
nominal, and maximum input voltage at 25°C, Vout= 13 .2V.
0
2
4
6
8
10
12
30.0 31.3 33.6 35.0 40.0 45.0 50.0 55.0 60.0 65.0 70.0 75.0
Output Current (A)
Output Voltage (V)
Figure 7: Typical input characteristics at room temperature. Figure 8: Turn-on transient at full rated load current, 4ms/div:
Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div.
0
0

DS_H48SA12025_05052008
5
ELECTRICAL CHARACTERISTICS CURVES
Figure 9: Turn-on transient at zero load current, 4 ms/div;
Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,
5V/div.
Figure 10: Output voltage response to step-change in load
current, 200mV/div, 200us/div. 75%-50%-75% of Io, max, di/dt =
0.1
A
/µs. Load cap: 10µF, tantalum capacitor and 1µF ceramic
capacitor.
Scope measurement should be made using a BNC cable (length
shorter than 20 inches). Position the load between 51 mm to 76
mm (2 inches to 3 inches) from the module..
Vin+
Vin-
is ic
100uF,
ESR=0.2 ohm @
25oC 100KHz
Cs: 220uF
+ +
Vin+
Vin-
is ic
100uF,
ESR=0.2 ohm @
25oC 100KHz
Cs: 220uF
++ ++
Figure 11: Output voltage response to step-change in load
current, 200mV/div, 1ms/div. 75%-50%-75% of Io, max, di/dt
= 1A/µs. Load cap: 5000µF tantalum capacitor and 1µF
ceramic capacitor.
Scope measurement should be made using a BNC cable
(length shorter than 20 inches). Position the load between
51 mm to 76 mm (2 inches to 3 inches) from the module..
Figure 12: Test set-up diagram showing measurement points for
Input Terminal Ripple Current and Input Reflected Ripple Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (LTEST) of 12 μH. Capacitor Cs offset
possible battery impedance. Measured current as shown below.
0
0
0
0